The energy in water pooled behind a dam is converted to energy as gravity causes the water to surge through tunnels in the dam. the energy in the moving water is then converted to hydroelectric power as the water spins turbines inside the dam.

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions